./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 31de98bafea1eb3233157f378400eba30060b6561e9e0a6257ecfebe8e53877a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:31:21,453 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:31:21,529 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 17:31:21,533 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:31:21,534 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:31:21,558 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:31:21,559 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:31:21,560 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:31:21,560 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:31:21,561 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:31:21,562 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:31:21,562 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:31:21,563 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:31:21,563 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:31:21,564 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:31:21,564 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:31:21,565 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:31:21,565 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:31:21,566 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:31:21,566 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:31:21,567 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:31:21,567 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:31:21,568 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:31:21,569 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:31:21,569 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 17:31:21,569 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:31:21,570 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 17:31:21,570 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:31:21,571 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:31:21,571 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:31:21,571 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:31:21,572 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 17:31:21,572 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 17:31:21,573 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 17:31:21,573 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:31:21,573 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:31:21,573 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:31:21,573 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:31:21,574 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:31:21,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:31:21,574 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:31:21,574 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:31:21,575 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:31:21,575 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:31:21,575 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:31:21,575 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:31:21,575 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:31:21,576 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:31:21,576 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:31:21,576 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31de98bafea1eb3233157f378400eba30060b6561e9e0a6257ecfebe8e53877a [2023-12-02 17:31:21,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:31:21,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:31:21,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:31:21,838 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:31:21,838 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:31:21,839 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2023-12-02 17:31:24,525 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:31:24,680 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:31:24,681 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2023-12-02 17:31:24,686 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/data/11393a0ef/a45ce94572d14dcc8218176a89e2317b/FLAG7afaeabdc [2023-12-02 17:31:24,698 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/data/11393a0ef/a45ce94572d14dcc8218176a89e2317b [2023-12-02 17:31:24,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:31:24,701 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:31:24,703 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:31:24,703 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:31:24,708 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:31:24,709 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,709 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ec2a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24, skipping insertion in model container [2023-12-02 17:31:24,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,730 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:31:24,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:31:24,876 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:31:24,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:31:24,916 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:31:24,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24 WrapperNode [2023-12-02 17:31:24,917 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:31:24,918 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:31:24,918 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:31:24,918 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:31:24,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,949 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2023-12-02 17:31:24,949 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:31:24,950 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:31:24,950 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:31:24,950 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:31:24,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,958 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,958 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,961 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,963 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,964 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,965 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:31:24,967 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:31:24,968 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:31:24,968 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:31:24,969 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (1/1) ... [2023-12-02 17:31:24,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:31:24,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:24,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:31:24,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:31:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:31:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:31:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2023-12-02 17:31:25,024 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2023-12-02 17:31:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2023-12-02 17:31:25,024 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2023-12-02 17:31:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:31:25,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:31:25,082 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:31:25,084 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:31:25,239 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:31:25,269 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:31:25,270 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 17:31:25,272 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:31:25 BoogieIcfgContainer [2023-12-02 17:31:25,272 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:31:25,274 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:31:25,275 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:31:25,278 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:31:25,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:31:24" (1/3) ... [2023-12-02 17:31:25,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221ddd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:31:25, skipping insertion in model container [2023-12-02 17:31:25,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:31:24" (2/3) ... [2023-12-02 17:31:25,279 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@221ddd75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:31:25, skipping insertion in model container [2023-12-02 17:31:25,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:31:25" (3/3) ... [2023-12-02 17:31:25,281 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2023-12-02 17:31:25,300 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:31:25,300 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-12-02 17:31:25,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:31:25,356 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@21f978fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:31:25,356 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-12-02 17:31:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 17:31:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 17:31:25,367 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:25,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 17:31:25,368 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:25,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:25,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1021543012, now seen corresponding path program 1 times [2023-12-02 17:31:25,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:25,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515392329] [2023-12-02 17:31:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:25,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:25,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:25,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515392329] [2023-12-02 17:31:25,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515392329] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:25,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:25,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:31:25,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436365854] [2023-12-02 17:31:25,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:25,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:31:25,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:25,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:31:25,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:31:25,578 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:25,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:25,631 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2023-12-02 17:31:25,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:31:25,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 17:31:25,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:25,640 INFO L225 Difference]: With dead ends: 48 [2023-12-02 17:31:25,640 INFO L226 Difference]: Without dead ends: 44 [2023-12-02 17:31:25,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:31:25,647 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:25,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 76 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-02 17:31:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-12-02 17:31:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 17:31:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-12-02 17:31:25,683 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 6 [2023-12-02 17:31:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:25,683 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-12-02 17:31:25,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-12-02 17:31:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 17:31:25,685 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:25,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:25,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:31:25,686 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:25,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1603062213, now seen corresponding path program 1 times [2023-12-02 17:31:25,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:25,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151400322] [2023-12-02 17:31:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:25,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:25,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:25,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151400322] [2023-12-02 17:31:25,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151400322] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:25,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:25,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:31:25,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594547362] [2023-12-02 17:31:25,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:25,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:31:25,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:25,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:31:25,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:25,767 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:25,845 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2023-12-02 17:31:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:31:25,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 17:31:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:25,847 INFO L225 Difference]: With dead ends: 63 [2023-12-02 17:31:25,847 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 17:31:25,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 17:31:25,849 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 29 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:25,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 155 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 17:31:25,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2023-12-02 17:31:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 45 states have internal predecessors, (51), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 17:31:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-12-02 17:31:25,863 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2023-12-02 17:31:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:25,863 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-12-02 17:31:25,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:25,863 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-12-02 17:31:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 17:31:25,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:25,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:25,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:31:25,865 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:25,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:25,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1070030294, now seen corresponding path program 1 times [2023-12-02 17:31:25,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:25,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324305811] [2023-12-02 17:31:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:25,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:25,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324305811] [2023-12-02 17:31:25,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324305811] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:25,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:25,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 17:31:25,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339657297] [2023-12-02 17:31:25,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:25,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:31:25,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:25,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:31:25,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:31:25,912 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:25,937 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2023-12-02 17:31:25,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:31:25,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 17:31:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:25,939 INFO L225 Difference]: With dead ends: 57 [2023-12-02 17:31:25,939 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 17:31:25,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:31:25,941 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:25,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 68 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 17:31:25,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-12-02 17:31:25,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 43 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 17:31:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-12-02 17:31:25,953 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 12 [2023-12-02 17:31:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:25,953 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-12-02 17:31:25,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-12-02 17:31:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 17:31:25,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:25,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:25,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:31:25,955 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:25,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:25,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1188799193, now seen corresponding path program 1 times [2023-12-02 17:31:25,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:25,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988182243] [2023-12-02 17:31:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:25,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:26,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:26,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988182243] [2023-12-02 17:31:26,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988182243] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:26,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:26,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 17:31:26,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843735534] [2023-12-02 17:31:26,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:26,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:31:26,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:26,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:31:26,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 17:31:26,057 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:26,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:26,161 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-12-02 17:31:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:31:26,161 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 17:31:26,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:26,162 INFO L225 Difference]: With dead ends: 53 [2023-12-02 17:31:26,162 INFO L226 Difference]: Without dead ends: 49 [2023-12-02 17:31:26,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:31:26,165 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:26,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 81 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:31:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-02 17:31:26,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-12-02 17:31:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 17:31:26,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2023-12-02 17:31:26,175 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 13 [2023-12-02 17:31:26,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:26,175 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2023-12-02 17:31:26,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:31:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2023-12-02 17:31:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 17:31:26,177 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:26,177 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:26,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:31:26,178 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:26,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:26,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1317113808, now seen corresponding path program 1 times [2023-12-02 17:31:26,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:26,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702183740] [2023-12-02 17:31:26,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:26,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:31:26,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:26,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702183740] [2023-12-02 17:31:26,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702183740] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:26,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:26,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:31:26,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48432718] [2023-12-02 17:31:26,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:26,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:31:26,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:26,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:31:26,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:26,298 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:26,336 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2023-12-02 17:31:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:31:26,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-12-02 17:31:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:26,338 INFO L225 Difference]: With dead ends: 75 [2023-12-02 17:31:26,339 INFO L226 Difference]: Without dead ends: 70 [2023-12-02 17:31:26,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:26,340 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:26,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 109 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-02 17:31:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2023-12-02 17:31:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 49 states have internal predecessors, (55), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2023-12-02 17:31:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2023-12-02 17:31:26,352 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 22 [2023-12-02 17:31:26,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:26,353 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2023-12-02 17:31:26,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:26,353 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2023-12-02 17:31:26,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 17:31:26,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:26,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:26,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:31:26,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:26,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:26,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2108197165, now seen corresponding path program 1 times [2023-12-02 17:31:26,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:26,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441934498] [2023-12-02 17:31:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:26,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:31:26,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:26,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441934498] [2023-12-02 17:31:26,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441934498] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:26,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966599886] [2023-12-02 17:31:26,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:26,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:26,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:26,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:26,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:31:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:26,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 17:31:26,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:26,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:31:26,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966599886] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:26,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:31:26,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2023-12-02 17:31:26,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196872918] [2023-12-02 17:31:26,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:26,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 17:31:26,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:26,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 17:31:26,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:31:26,621 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:26,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:26,733 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2023-12-02 17:31:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 17:31:26,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-12-02 17:31:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:26,735 INFO L225 Difference]: With dead ends: 110 [2023-12-02 17:31:26,735 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 17:31:26,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-12-02 17:31:26,737 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:26,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 128 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:31:26,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 17:31:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2023-12-02 17:31:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 46 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 17:31:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-12-02 17:31:26,747 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 23 [2023-12-02 17:31:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:26,748 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-12-02 17:31:26,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-12-02 17:31:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 17:31:26,750 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:26,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:26,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 17:31:26,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:26,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:26,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1308693282, now seen corresponding path program 1 times [2023-12-02 17:31:26,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:26,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042246792] [2023-12-02 17:31:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:26,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:31:27,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:27,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042246792] [2023-12-02 17:31:27,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042246792] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:27,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:27,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:31:27,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248592273] [2023-12-02 17:31:27,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:27,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:31:27,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:27,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:31:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:27,028 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:27,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:27,067 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2023-12-02 17:31:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:31:27,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-12-02 17:31:27,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:27,069 INFO L225 Difference]: With dead ends: 84 [2023-12-02 17:31:27,069 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 17:31:27,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:27,071 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:27,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 110 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 17:31:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2023-12-02 17:31:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.18) internal successors, (59), 54 states have internal predecessors, (59), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2023-12-02 17:31:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2023-12-02 17:31:27,082 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 24 [2023-12-02 17:31:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:27,083 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2023-12-02 17:31:27,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2023-12-02 17:31:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 17:31:27,084 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:27,085 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:27,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 17:31:27,085 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:27,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:27,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1559204346, now seen corresponding path program 1 times [2023-12-02 17:31:27,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:27,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621485434] [2023-12-02 17:31:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:27,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:31:27,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:27,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621485434] [2023-12-02 17:31:27,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621485434] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:27,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:27,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:31:27,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94673683] [2023-12-02 17:31:27,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:27,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:31:27,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:27,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:31:27,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:27,159 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:27,194 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2023-12-02 17:31:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:31:27,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-12-02 17:31:27,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:27,197 INFO L225 Difference]: With dead ends: 84 [2023-12-02 17:31:27,197 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 17:31:27,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:27,198 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:27,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 109 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 17:31:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2023-12-02 17:31:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 61 states have internal predecessors, (66), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2023-12-02 17:31:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2023-12-02 17:31:27,212 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 28 [2023-12-02 17:31:27,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:27,212 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2023-12-02 17:31:27,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:27,213 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2023-12-02 17:31:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 17:31:27,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:27,214 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:27,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 17:31:27,215 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:27,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:27,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1102557063, now seen corresponding path program 1 times [2023-12-02 17:31:27,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:27,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171039888] [2023-12-02 17:31:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:27,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 17:31:27,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:27,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171039888] [2023-12-02 17:31:27,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171039888] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:27,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848753849] [2023-12-02 17:31:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:27,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:27,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:27,283 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:27,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 17:31:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:27,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:31:27,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:27,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:27,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:31:27,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848753849] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:27,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968497458] [2023-12-02 17:31:27,640 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:31:27,640 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:27,644 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:27,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:27,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-12-02 17:31:27,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187799181] [2023-12-02 17:31:27,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:27,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:31:27,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:27,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:31:27,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:31:27,649 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 17:31:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:28,129 INFO L93 Difference]: Finished difference Result 205 states and 274 transitions. [2023-12-02 17:31:28,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 17:31:28,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2023-12-02 17:31:28,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:28,131 INFO L225 Difference]: With dead ends: 205 [2023-12-02 17:31:28,131 INFO L226 Difference]: Without dead ends: 136 [2023-12-02 17:31:28,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:31:28,134 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 133 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:28,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 591 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:31:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-12-02 17:31:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2023-12-02 17:31:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.164835164835165) internal successors, (106), 96 states have internal predecessors, (106), 16 states have call successors, (16), 6 states have call predecessors, (16), 9 states have return successors, (34), 17 states have call predecessors, (34), 15 states have call successors, (34) [2023-12-02 17:31:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2023-12-02 17:31:28,153 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 29 [2023-12-02 17:31:28,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:28,154 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2023-12-02 17:31:28,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 17:31:28,154 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2023-12-02 17:31:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 17:31:28,156 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:28,156 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:28,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 17:31:28,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 17:31:28,359 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:28,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1810923195, now seen corresponding path program 2 times [2023-12-02 17:31:28,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:28,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269920135] [2023-12-02 17:31:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:28,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:31:28,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:28,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269920135] [2023-12-02 17:31:28,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269920135] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:28,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610891572] [2023-12-02 17:31:28,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:31:28,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:28,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:28,446 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:28,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 17:31:28,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 17:31:28,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:31:28,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:31:28,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:31:28,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:31:28,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610891572] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:28,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:31:28,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-12-02 17:31:28,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566250466] [2023-12-02 17:31:28,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:28,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:31:28,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:28,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:31:28,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:31:28,534 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:28,565 INFO L93 Difference]: Finished difference Result 130 states and 168 transitions. [2023-12-02 17:31:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:31:28,566 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2023-12-02 17:31:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:28,567 INFO L225 Difference]: With dead ends: 130 [2023-12-02 17:31:28,568 INFO L226 Difference]: Without dead ends: 129 [2023-12-02 17:31:28,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:31:28,569 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:28,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 132 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-02 17:31:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2023-12-02 17:31:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 16 states have call successors, (16), 6 states have call predecessors, (16), 9 states have return successors, (34), 19 states have call predecessors, (34), 15 states have call successors, (34) [2023-12-02 17:31:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2023-12-02 17:31:28,585 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 41 [2023-12-02 17:31:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:28,586 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2023-12-02 17:31:28,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2023-12-02 17:31:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 17:31:28,588 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:28,588 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:28,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 17:31:28,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 17:31:28,795 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:28,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:28,796 INFO L85 PathProgramCache]: Analyzing trace with hash 304044270, now seen corresponding path program 1 times [2023-12-02 17:31:28,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:28,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000581385] [2023-12-02 17:31:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:28,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 17:31:28,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:28,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000581385] [2023-12-02 17:31:28,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000581385] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:28,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682172718] [2023-12-02 17:31:28,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:28,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:28,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:28,880 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:28,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 17:31:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:28,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:31:28,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:29,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:31:29,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682172718] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:29,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1568356505] [2023-12-02 17:31:29,313 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 17:31:29,313 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:29,313 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:29,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:29,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 18 [2023-12-02 17:31:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851361757] [2023-12-02 17:31:29,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:29,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:31:29,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:29,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:31:29,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:31:29,317 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 17:31:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:29,749 INFO L93 Difference]: Finished difference Result 300 states and 387 transitions. [2023-12-02 17:31:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 17:31:29,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2023-12-02 17:31:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:29,752 INFO L225 Difference]: With dead ends: 300 [2023-12-02 17:31:29,752 INFO L226 Difference]: Without dead ends: 190 [2023-12-02 17:31:29,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2023-12-02 17:31:29,754 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 126 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:29,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 586 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:31:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-12-02 17:31:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 167. [2023-12-02 17:31:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 130 states have (on average 1.146153846153846) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 8 states have call predecessors, (22), 11 states have return successors, (48), 27 states have call predecessors, (48), 21 states have call successors, (48) [2023-12-02 17:31:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 219 transitions. [2023-12-02 17:31:29,776 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 219 transitions. Word has length 42 [2023-12-02 17:31:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:29,776 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 219 transitions. [2023-12-02 17:31:29,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 17:31:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 219 transitions. [2023-12-02 17:31:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 17:31:29,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:29,778 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:29,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 17:31:29,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 17:31:29,983 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:29,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:29,983 INFO L85 PathProgramCache]: Analyzing trace with hash -145283649, now seen corresponding path program 1 times [2023-12-02 17:31:29,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:29,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358551934] [2023-12-02 17:31:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:29,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:31:30,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:30,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358551934] [2023-12-02 17:31:30,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358551934] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:30,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271025945] [2023-12-02 17:31:30,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:30,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:30,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:30,066 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:30,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 17:31:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:30,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:31:30,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 17:31:30,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 17:31:30,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271025945] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:30,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [78919712] [2023-12-02 17:31:30,518 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 17:31:30,519 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:30,519 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:30,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:30,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 15, 15] total 20 [2023-12-02 17:31:30,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746527071] [2023-12-02 17:31:30,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:30,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 17:31:30,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 17:31:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:31:30,522 INFO L87 Difference]: Start difference. First operand 167 states and 219 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 15 states have internal predecessors, (62), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 17:31:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:31,024 INFO L93 Difference]: Finished difference Result 357 states and 467 transitions. [2023-12-02 17:31:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 17:31:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 15 states have internal predecessors, (62), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2023-12-02 17:31:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:31,027 INFO L225 Difference]: With dead ends: 357 [2023-12-02 17:31:31,027 INFO L226 Difference]: Without dead ends: 210 [2023-12-02 17:31:31,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:31:31,029 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 171 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:31,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 626 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:31:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-12-02 17:31:31,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2023-12-02 17:31:31,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 148 states have (on average 1.1418918918918919) internal successors, (169), 148 states have internal predecessors, (169), 25 states have call successors, (25), 9 states have call predecessors, (25), 12 states have return successors, (55), 31 states have call predecessors, (55), 24 states have call successors, (55) [2023-12-02 17:31:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 249 transitions. [2023-12-02 17:31:31,046 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 249 transitions. Word has length 47 [2023-12-02 17:31:31,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:31,046 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 249 transitions. [2023-12-02 17:31:31,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 15 states have internal predecessors, (62), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 17:31:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 249 transitions. [2023-12-02 17:31:31,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 17:31:31,048 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:31,048 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:31,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 17:31:31,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 17:31:31,254 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:31,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:31,254 INFO L85 PathProgramCache]: Analyzing trace with hash -350528371, now seen corresponding path program 2 times [2023-12-02 17:31:31,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:31,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718318471] [2023-12-02 17:31:31,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:31,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:31:31,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:31,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718318471] [2023-12-02 17:31:31,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718318471] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:31,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122288336] [2023-12-02 17:31:31,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:31:31,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:31,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:31,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:31,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 17:31:31,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 17:31:31,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:31:31,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 17:31:31,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:31:31,421 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:31:31,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122288336] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:31,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:31:31,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-12-02 17:31:31,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997336457] [2023-12-02 17:31:31,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:31,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:31:31,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:31,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:31:31,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:31:31,423 INFO L87 Difference]: Start difference. First operand 189 states and 249 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:31,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:31,454 INFO L93 Difference]: Finished difference Result 203 states and 269 transitions. [2023-12-02 17:31:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:31:31,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2023-12-02 17:31:31,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:31,456 INFO L225 Difference]: With dead ends: 203 [2023-12-02 17:31:31,456 INFO L226 Difference]: Without dead ends: 202 [2023-12-02 17:31:31,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 17:31:31,457 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:31,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 101 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:31,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-12-02 17:31:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2023-12-02 17:31:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 156 states have (on average 1.1346153846153846) internal successors, (177), 152 states have internal predecessors, (177), 25 states have call successors, (25), 9 states have call predecessors, (25), 12 states have return successors, (55), 35 states have call predecessors, (55), 24 states have call successors, (55) [2023-12-02 17:31:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 257 transitions. [2023-12-02 17:31:31,474 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 257 transitions. Word has length 47 [2023-12-02 17:31:31,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:31,475 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 257 transitions. [2023-12-02 17:31:31,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 257 transitions. [2023-12-02 17:31:31,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 17:31:31,476 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:31,476 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:31,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 17:31:31,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 17:31:31,679 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:31,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:31,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2018522486, now seen corresponding path program 1 times [2023-12-02 17:31:31,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:31,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590846487] [2023-12-02 17:31:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:31,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:31:31,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:31,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590846487] [2023-12-02 17:31:31,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590846487] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:31,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557213752] [2023-12-02 17:31:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:31,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:31,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:31,752 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:31,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 17:31:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:31,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 17:31:31,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 17:31:31,843 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:31:31,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557213752] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:31,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:31:31,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2023-12-02 17:31:31,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667728621] [2023-12-02 17:31:31,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:31,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 17:31:31,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 17:31:31,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:31:31,845 INFO L87 Difference]: Start difference. First operand 197 states and 257 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:31,884 INFO L93 Difference]: Finished difference Result 215 states and 278 transitions. [2023-12-02 17:31:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 17:31:31,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2023-12-02 17:31:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:31,886 INFO L225 Difference]: With dead ends: 215 [2023-12-02 17:31:31,887 INFO L226 Difference]: Without dead ends: 214 [2023-12-02 17:31:31,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-02 17:31:31,888 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:31,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 174 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-12-02 17:31:31,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 193. [2023-12-02 17:31:31,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 153 states have (on average 1.1372549019607843) internal successors, (174), 149 states have internal predecessors, (174), 24 states have call successors, (24), 9 states have call predecessors, (24), 12 states have return successors, (52), 34 states have call predecessors, (52), 23 states have call successors, (52) [2023-12-02 17:31:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 250 transitions. [2023-12-02 17:31:31,902 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 250 transitions. Word has length 48 [2023-12-02 17:31:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:31,902 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 250 transitions. [2023-12-02 17:31:31,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 17:31:31,903 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 250 transitions. [2023-12-02 17:31:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 17:31:31,904 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:31,904 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:31,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 17:31:32,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 17:31:32,105 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:32,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:32,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1049617255, now seen corresponding path program 1 times [2023-12-02 17:31:32,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:32,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760407457] [2023-12-02 17:31:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:32,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-12-02 17:31:32,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:32,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760407457] [2023-12-02 17:31:32,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760407457] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:32,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:32,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:31:32,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382568818] [2023-12-02 17:31:32,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:32,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:31:32,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:31:32,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:32,167 INFO L87 Difference]: Start difference. First operand 193 states and 250 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:31:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:32,202 INFO L93 Difference]: Finished difference Result 211 states and 271 transitions. [2023-12-02 17:31:32,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:31:32,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2023-12-02 17:31:32,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:32,204 INFO L225 Difference]: With dead ends: 211 [2023-12-02 17:31:32,204 INFO L226 Difference]: Without dead ends: 210 [2023-12-02 17:31:32,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:32,205 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:32,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 137 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:32,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-12-02 17:31:32,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2023-12-02 17:31:32,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 150 states have (on average 1.14) internal successors, (171), 146 states have internal predecessors, (171), 23 states have call successors, (23), 9 states have call predecessors, (23), 12 states have return successors, (49), 33 states have call predecessors, (49), 22 states have call successors, (49) [2023-12-02 17:31:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 243 transitions. [2023-12-02 17:31:32,218 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 243 transitions. Word has length 64 [2023-12-02 17:31:32,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:32,218 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 243 transitions. [2023-12-02 17:31:32,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 17:31:32,219 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 243 transitions. [2023-12-02 17:31:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 17:31:32,219 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:32,220 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:32,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 17:31:32,220 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:32,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash 525191420, now seen corresponding path program 1 times [2023-12-02 17:31:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:32,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991202404] [2023-12-02 17:31:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:32,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-12-02 17:31:32,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:32,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991202404] [2023-12-02 17:31:32,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991202404] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:32,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363024400] [2023-12-02 17:31:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:32,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:32,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:32,290 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:32,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 17:31:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:32,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:31:32,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:31:32,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:31:32,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363024400] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:32,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1793328437] [2023-12-02 17:31:32,733 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 17:31:32,733 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:32,734 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:32,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:32,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 15, 15] total 19 [2023-12-02 17:31:32,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040090188] [2023-12-02 17:31:32,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:32,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 17:31:32,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:32,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 17:31:32,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-12-02 17:31:32,737 INFO L87 Difference]: Start difference. First operand 189 states and 243 transitions. Second operand has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 14 states have internal predecessors, (74), 9 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 17:31:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:33,202 INFO L93 Difference]: Finished difference Result 451 states and 614 transitions. [2023-12-02 17:31:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 17:31:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 14 states have internal predecessors, (74), 9 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2023-12-02 17:31:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:33,205 INFO L225 Difference]: With dead ends: 451 [2023-12-02 17:31:33,205 INFO L226 Difference]: Without dead ends: 282 [2023-12-02 17:31:33,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 113 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:31:33,208 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 201 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:33,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 224 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:31:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-12-02 17:31:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 256. [2023-12-02 17:31:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 204 states have (on average 1.1323529411764706) internal successors, (231), 198 states have internal predecessors, (231), 32 states have call successors, (32), 12 states have call predecessors, (32), 16 states have return successors, (64), 45 states have call predecessors, (64), 31 states have call successors, (64) [2023-12-02 17:31:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 327 transitions. [2023-12-02 17:31:33,230 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 327 transitions. Word has length 67 [2023-12-02 17:31:33,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:33,230 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 327 transitions. [2023-12-02 17:31:33,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 14 states have internal predecessors, (74), 9 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-02 17:31:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 327 transitions. [2023-12-02 17:31:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 17:31:33,231 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:33,232 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:33,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 17:31:33,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:33,437 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:33,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:33,437 INFO L85 PathProgramCache]: Analyzing trace with hash -93027204, now seen corresponding path program 1 times [2023-12-02 17:31:33,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:33,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485028516] [2023-12-02 17:31:33,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:33,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-12-02 17:31:33,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:33,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485028516] [2023-12-02 17:31:33,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485028516] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:33,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:33,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:31:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273428882] [2023-12-02 17:31:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:33,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:31:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:31:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:33,498 INFO L87 Difference]: Start difference. First operand 256 states and 327 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:31:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:33,531 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2023-12-02 17:31:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:31:33,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2023-12-02 17:31:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:33,554 INFO L225 Difference]: With dead ends: 278 [2023-12-02 17:31:33,554 INFO L226 Difference]: Without dead ends: 277 [2023-12-02 17:31:33,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:33,556 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:33,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 101 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-12-02 17:31:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 264. [2023-12-02 17:31:33,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 211 states have (on average 1.127962085308057) internal successors, (238), 204 states have internal predecessors, (238), 32 states have call successors, (32), 12 states have call predecessors, (32), 17 states have return successors, (65), 47 states have call predecessors, (65), 31 states have call successors, (65) [2023-12-02 17:31:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 335 transitions. [2023-12-02 17:31:33,575 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 335 transitions. Word has length 61 [2023-12-02 17:31:33,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:33,576 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 335 transitions. [2023-12-02 17:31:33,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:31:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 335 transitions. [2023-12-02 17:31:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 17:31:33,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:33,578 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:33,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 17:31:33,578 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:33,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:33,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1778862165, now seen corresponding path program 1 times [2023-12-02 17:31:33,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:33,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933773752] [2023-12-02 17:31:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:33,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:33,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 17:31:33,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:33,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933773752] [2023-12-02 17:31:33,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933773752] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:33,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859018382] [2023-12-02 17:31:33,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:33,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:33,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:33,715 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:33,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 17:31:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:33,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 17:31:33,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 17:31:33,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 17:31:33,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859018382] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:33,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 17:31:33,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2023-12-02 17:31:33,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140072383] [2023-12-02 17:31:33,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:33,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 17:31:33,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 17:31:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:31:33,857 INFO L87 Difference]: Start difference. First operand 264 states and 335 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 17:31:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:33,937 INFO L93 Difference]: Finished difference Result 352 states and 458 transitions. [2023-12-02 17:31:33,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:31:33,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2023-12-02 17:31:33,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:33,941 INFO L225 Difference]: With dead ends: 352 [2023-12-02 17:31:33,941 INFO L226 Difference]: Without dead ends: 351 [2023-12-02 17:31:33,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:31:33,942 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:33,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 190 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:31:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-12-02 17:31:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 294. [2023-12-02 17:31:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 235 states have (on average 1.1319148936170214) internal successors, (266), 226 states have internal predecessors, (266), 34 states have call successors, (34), 12 states have call predecessors, (34), 21 states have return successors, (83), 55 states have call predecessors, (83), 33 states have call successors, (83) [2023-12-02 17:31:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 383 transitions. [2023-12-02 17:31:33,965 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 383 transitions. Word has length 62 [2023-12-02 17:31:33,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:33,965 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 383 transitions. [2023-12-02 17:31:33,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 17:31:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 383 transitions. [2023-12-02 17:31:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 17:31:33,967 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:33,967 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:33,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 17:31:34,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 17:31:34,168 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:34,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1017747310, now seen corresponding path program 1 times [2023-12-02 17:31:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:34,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399779921] [2023-12-02 17:31:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:34,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2023-12-02 17:31:34,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:34,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399779921] [2023-12-02 17:31:34,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399779921] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:34,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440122312] [2023-12-02 17:31:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:34,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:34,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:34,236 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:34,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 17:31:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:34,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 17:31:34,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 87 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 17:31:34,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 39 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:31:34,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440122312] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:34,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405811744] [2023-12-02 17:31:34,643 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 17:31:34,643 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:34,644 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:34,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:34,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 15, 15] total 18 [2023-12-02 17:31:34,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086292767] [2023-12-02 17:31:34,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:34,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 17:31:34,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:34,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 17:31:34,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-12-02 17:31:34,647 INFO L87 Difference]: Start difference. First operand 294 states and 383 transitions. Second operand has 18 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 12 states have internal predecessors, (84), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 17:31:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:35,065 INFO L93 Difference]: Finished difference Result 378 states and 483 transitions. [2023-12-02 17:31:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 17:31:35,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 12 states have internal predecessors, (84), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 80 [2023-12-02 17:31:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:35,069 INFO L225 Difference]: With dead ends: 378 [2023-12-02 17:31:35,069 INFO L226 Difference]: Without dead ends: 317 [2023-12-02 17:31:35,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 139 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-12-02 17:31:35,071 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 160 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:35,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 259 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:31:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-12-02 17:31:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 302. [2023-12-02 17:31:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 241 states have (on average 1.1286307053941909) internal successors, (272), 232 states have internal predecessors, (272), 35 states have call successors, (35), 13 states have call predecessors, (35), 22 states have return successors, (87), 56 states have call predecessors, (87), 34 states have call successors, (87) [2023-12-02 17:31:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 394 transitions. [2023-12-02 17:31:35,094 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 394 transitions. Word has length 80 [2023-12-02 17:31:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:35,094 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 394 transitions. [2023-12-02 17:31:35,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 12 states have internal predecessors, (84), 9 states have call successors, (18), 8 states have call predecessors, (18), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2023-12-02 17:31:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 394 transitions. [2023-12-02 17:31:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 17:31:35,096 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:35,096 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:35,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 17:31:35,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:35,296 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:35,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:35,297 INFO L85 PathProgramCache]: Analyzing trace with hash 951340651, now seen corresponding path program 1 times [2023-12-02 17:31:35,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:35,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112561791] [2023-12-02 17:31:35,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:35,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-12-02 17:31:35,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:35,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112561791] [2023-12-02 17:31:35,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112561791] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:35,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466243982] [2023-12-02 17:31:35,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:35,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:35,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:35,344 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:35,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 17:31:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:35,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 17:31:35,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 71 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:31:35,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 43 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 17:31:35,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466243982] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:35,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732656207] [2023-12-02 17:31:35,769 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 17:31:35,769 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:35,769 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:35,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:35,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 17, 17] total 21 [2023-12-02 17:31:35,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402865932] [2023-12-02 17:31:35,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:35,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 17:31:35,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:35,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 17:31:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-12-02 17:31:35,772 INFO L87 Difference]: Start difference. First operand 302 states and 394 transitions. Second operand has 21 states, 20 states have (on average 4.2) internal successors, (84), 15 states have internal predecessors, (84), 10 states have call successors, (16), 8 states have call predecessors, (16), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 17:31:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:36,300 INFO L93 Difference]: Finished difference Result 608 states and 829 transitions. [2023-12-02 17:31:36,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:31:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 15 states have internal predecessors, (84), 10 states have call successors, (16), 8 states have call predecessors, (16), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2023-12-02 17:31:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:36,304 INFO L225 Difference]: With dead ends: 608 [2023-12-02 17:31:36,305 INFO L226 Difference]: Without dead ends: 353 [2023-12-02 17:31:36,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 124 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:31:36,308 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 264 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:36,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 341 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:31:36,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2023-12-02 17:31:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 325. [2023-12-02 17:31:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 258 states have (on average 1.127906976744186) internal successors, (291), 251 states have internal predecessors, (291), 38 states have call successors, (38), 14 states have call predecessors, (38), 25 states have return successors, (93), 59 states have call predecessors, (93), 37 states have call successors, (93) [2023-12-02 17:31:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 422 transitions. [2023-12-02 17:31:36,332 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 422 transitions. Word has length 72 [2023-12-02 17:31:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:36,332 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 422 transitions. [2023-12-02 17:31:36,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 15 states have internal predecessors, (84), 10 states have call successors, (16), 8 states have call predecessors, (16), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2023-12-02 17:31:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 422 transitions. [2023-12-02 17:31:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 17:31:36,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:36,334 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:36,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 17:31:36,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:36,534 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:36,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash 2066237387, now seen corresponding path program 1 times [2023-12-02 17:31:36,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:36,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324646213] [2023-12-02 17:31:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:36,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-12-02 17:31:36,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:36,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324646213] [2023-12-02 17:31:36,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324646213] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:31:36,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:31:36,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:31:36,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515288876] [2023-12-02 17:31:36,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:31:36,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 17:31:36,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:36,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 17:31:36,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:36,591 INFO L87 Difference]: Start difference. First operand 325 states and 422 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:31:36,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:36,626 INFO L93 Difference]: Finished difference Result 336 states and 435 transitions. [2023-12-02 17:31:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 17:31:36,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2023-12-02 17:31:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:36,629 INFO L225 Difference]: With dead ends: 336 [2023-12-02 17:31:36,629 INFO L226 Difference]: Without dead ends: 335 [2023-12-02 17:31:36,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 17:31:36,631 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:36,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 137 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 17:31:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2023-12-02 17:31:36,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 328. [2023-12-02 17:31:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 261 states have (on average 1.1187739463601531) internal successors, (292), 253 states have internal predecessors, (292), 38 states have call successors, (38), 14 states have call predecessors, (38), 25 states have return successors, (93), 60 states have call predecessors, (93), 37 states have call successors, (93) [2023-12-02 17:31:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 423 transitions. [2023-12-02 17:31:36,654 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 423 transitions. Word has length 66 [2023-12-02 17:31:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:36,654 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 423 transitions. [2023-12-02 17:31:36,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:31:36,655 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 423 transitions. [2023-12-02 17:31:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 17:31:36,656 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:36,656 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:36,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 17:31:36,656 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:36,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:36,657 INFO L85 PathProgramCache]: Analyzing trace with hash 924780719, now seen corresponding path program 1 times [2023-12-02 17:31:36,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:36,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138933889] [2023-12-02 17:31:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:36,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 17:31:36,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:36,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138933889] [2023-12-02 17:31:36,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138933889] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:36,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952723615] [2023-12-02 17:31:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:36,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:36,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:36,862 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:36,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 17:31:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:36,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:31:36,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-02 17:31:37,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:37,223 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-02 17:31:37,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952723615] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:37,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1484730451] [2023-12-02 17:31:37,226 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 17:31:37,226 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:37,226 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:37,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:37,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 27 [2023-12-02 17:31:37,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741317892] [2023-12-02 17:31:37,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:37,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 17:31:37,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:37,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 17:31:37,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:31:37,239 INFO L87 Difference]: Start difference. First operand 328 states and 423 transitions. Second operand has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 23 states have internal predecessors, (88), 11 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2023-12-02 17:31:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:38,137 INFO L93 Difference]: Finished difference Result 667 states and 889 transitions. [2023-12-02 17:31:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-02 17:31:38,139 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 23 states have internal predecessors, (88), 11 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) Word has length 79 [2023-12-02 17:31:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:38,143 INFO L225 Difference]: With dead ends: 667 [2023-12-02 17:31:38,143 INFO L226 Difference]: Without dead ends: 401 [2023-12-02 17:31:38,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2023-12-02 17:31:38,148 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 222 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:38,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 239 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 17:31:38,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-12-02 17:31:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 315. [2023-12-02 17:31:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 248 states have (on average 1.096774193548387) internal successors, (272), 247 states have internal predecessors, (272), 37 states have call successors, (37), 14 states have call predecessors, (37), 26 states have return successors, (78), 53 states have call predecessors, (78), 36 states have call successors, (78) [2023-12-02 17:31:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 387 transitions. [2023-12-02 17:31:38,174 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 387 transitions. Word has length 79 [2023-12-02 17:31:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:38,174 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 387 transitions. [2023-12-02 17:31:38,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 23 states have internal predecessors, (88), 11 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2023-12-02 17:31:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 387 transitions. [2023-12-02 17:31:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 17:31:38,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:38,176 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:38,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 17:31:38,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 17:31:38,376 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:38,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:38,377 INFO L85 PathProgramCache]: Analyzing trace with hash -446635783, now seen corresponding path program 1 times [2023-12-02 17:31:38,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:38,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760300773] [2023-12-02 17:31:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:38,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:31:38,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:38,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760300773] [2023-12-02 17:31:38,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760300773] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:38,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325157357] [2023-12-02 17:31:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:38,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:38,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:38,563 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:38,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 17:31:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:38,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:31:38,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 17:31:38,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 17:31:38,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325157357] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:38,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1428381272] [2023-12-02 17:31:38,912 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:38,912 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:38,913 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:38,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:38,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2023-12-02 17:31:38,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014320337] [2023-12-02 17:31:38,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:38,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 17:31:38,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:38,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 17:31:38,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-12-02 17:31:38,916 INFO L87 Difference]: Start difference. First operand 315 states and 387 transitions. Second operand has 15 states, 14 states have (on average 4.857142857142857) internal successors, (68), 12 states have internal predecessors, (68), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-02 17:31:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:39,167 INFO L93 Difference]: Finished difference Result 594 states and 733 transitions. [2023-12-02 17:31:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 17:31:39,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.857142857142857) internal successors, (68), 12 states have internal predecessors, (68), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 75 [2023-12-02 17:31:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:39,171 INFO L225 Difference]: With dead ends: 594 [2023-12-02 17:31:39,171 INFO L226 Difference]: Without dead ends: 333 [2023-12-02 17:31:39,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-12-02 17:31:39,174 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 107 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:39,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 377 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:31:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-12-02 17:31:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 313. [2023-12-02 17:31:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 247 states have (on average 1.0931174089068827) internal successors, (270), 245 states have internal predecessors, (270), 37 states have call successors, (37), 14 states have call predecessors, (37), 25 states have return successors, (73), 53 states have call predecessors, (73), 36 states have call successors, (73) [2023-12-02 17:31:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 380 transitions. [2023-12-02 17:31:39,189 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 380 transitions. Word has length 75 [2023-12-02 17:31:39,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:39,190 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 380 transitions. [2023-12-02 17:31:39,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.857142857142857) internal successors, (68), 12 states have internal predecessors, (68), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-02 17:31:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 380 transitions. [2023-12-02 17:31:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 17:31:39,191 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:39,191 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:39,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 17:31:39,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 17:31:39,392 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:39,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:39,392 INFO L85 PathProgramCache]: Analyzing trace with hash -94407406, now seen corresponding path program 1 times [2023-12-02 17:31:39,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:39,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671376098] [2023-12-02 17:31:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:39,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:31:39,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:39,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671376098] [2023-12-02 17:31:39,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671376098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:39,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170173716] [2023-12-02 17:31:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:39,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:39,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:39,498 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:39,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 17:31:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:39,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:31:39,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:31:39,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 17:31:39,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170173716] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:39,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [601249916] [2023-12-02 17:31:39,726 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:39,726 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:39,727 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:39,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:39,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2023-12-02 17:31:39,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922908436] [2023-12-02 17:31:39,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:39,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 17:31:39,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:39,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 17:31:39,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-12-02 17:31:39,729 INFO L87 Difference]: Start difference. First operand 313 states and 380 transitions. Second operand has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 9 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:31:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:39,899 INFO L93 Difference]: Finished difference Result 558 states and 676 transitions. [2023-12-02 17:31:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 17:31:39,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 9 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2023-12-02 17:31:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:39,902 INFO L225 Difference]: With dead ends: 558 [2023-12-02 17:31:39,902 INFO L226 Difference]: Without dead ends: 317 [2023-12-02 17:31:39,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-12-02 17:31:39,905 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 99 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:39,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 301 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:31:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-12-02 17:31:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 311. [2023-12-02 17:31:39,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 245 states have (on average 1.0938775510204082) internal successors, (268), 244 states have internal predecessors, (268), 37 states have call successors, (37), 14 states have call predecessors, (37), 25 states have return successors, (72), 52 states have call predecessors, (72), 36 states have call successors, (72) [2023-12-02 17:31:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 377 transitions. [2023-12-02 17:31:39,950 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 377 transitions. Word has length 76 [2023-12-02 17:31:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:39,950 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 377 transitions. [2023-12-02 17:31:39,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 9 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 17:31:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 377 transitions. [2023-12-02 17:31:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-12-02 17:31:39,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:39,952 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:39,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 17:31:40,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 17:31:40,153 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:40,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:40,153 INFO L85 PathProgramCache]: Analyzing trace with hash -701357590, now seen corresponding path program 1 times [2023-12-02 17:31:40,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:40,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552309290] [2023-12-02 17:31:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:40,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 23 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 17:31:40,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:40,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552309290] [2023-12-02 17:31:40,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552309290] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:40,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552289315] [2023-12-02 17:31:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:40,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:40,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:40,397 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:40,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 17:31:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:40,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 17:31:40,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:40,637 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 17:31:40,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-12-02 17:31:41,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552289315] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:41,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1966419711] [2023-12-02 17:31:41,051 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:41,051 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:41,052 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:41,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:41,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 11] total 32 [2023-12-02 17:31:41,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736537758] [2023-12-02 17:31:41,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:41,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 17:31:41,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:41,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 17:31:41,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2023-12-02 17:31:41,056 INFO L87 Difference]: Start difference. First operand 311 states and 377 transitions. Second operand has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 14 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-02 17:31:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:42,863 INFO L93 Difference]: Finished difference Result 771 states and 1023 transitions. [2023-12-02 17:31:42,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-12-02 17:31:42,864 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 14 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) Word has length 80 [2023-12-02 17:31:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:42,868 INFO L225 Difference]: With dead ends: 771 [2023-12-02 17:31:42,868 INFO L226 Difference]: Without dead ends: 487 [2023-12-02 17:31:42,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=836, Invalid=5484, Unknown=0, NotChecked=0, Total=6320 [2023-12-02 17:31:42,873 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 257 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:42,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 361 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 17:31:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-12-02 17:31:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 352. [2023-12-02 17:31:42,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 278 states have (on average 1.089928057553957) internal successors, (303), 273 states have internal predecessors, (303), 40 states have call successors, (40), 14 states have call predecessors, (40), 30 states have return successors, (123), 64 states have call predecessors, (123), 39 states have call successors, (123) [2023-12-02 17:31:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 466 transitions. [2023-12-02 17:31:42,926 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 466 transitions. Word has length 80 [2023-12-02 17:31:42,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:42,926 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 466 transitions. [2023-12-02 17:31:42,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 14 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-02 17:31:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 466 transitions. [2023-12-02 17:31:42,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 17:31:42,929 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:42,929 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:42,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 17:31:43,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 17:31:43,130 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:43,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:43,130 INFO L85 PathProgramCache]: Analyzing trace with hash 141363900, now seen corresponding path program 1 times [2023-12-02 17:31:43,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:43,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511515064] [2023-12-02 17:31:43,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:43,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-12-02 17:31:43,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:43,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511515064] [2023-12-02 17:31:43,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511515064] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:43,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291701003] [2023-12-02 17:31:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:43,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:43,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:43,229 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:43,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 17:31:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:43,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 17:31:43,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:31:43,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 17:31:43,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291701003] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:43,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [544363912] [2023-12-02 17:31:43,710 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:43,710 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:43,711 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:43,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:43,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 17 [2023-12-02 17:31:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302910893] [2023-12-02 17:31:43,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:43,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 17:31:43,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 17:31:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-12-02 17:31:43,715 INFO L87 Difference]: Start difference. First operand 352 states and 466 transitions. Second operand has 17 states, 16 states have (on average 5.1875) internal successors, (83), 14 states have internal predecessors, (83), 10 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-02 17:31:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:43,963 INFO L93 Difference]: Finished difference Result 656 states and 915 transitions. [2023-12-02 17:31:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 17:31:43,964 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.1875) internal successors, (83), 14 states have internal predecessors, (83), 10 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) Word has length 93 [2023-12-02 17:31:43,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:43,966 INFO L225 Difference]: With dead ends: 656 [2023-12-02 17:31:43,966 INFO L226 Difference]: Without dead ends: 358 [2023-12-02 17:31:43,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:31:43,970 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 153 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:43,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 333 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:31:43,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-12-02 17:31:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 352. [2023-12-02 17:31:43,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 278 states have (on average 1.089928057553957) internal successors, (303), 273 states have internal predecessors, (303), 40 states have call successors, (40), 14 states have call predecessors, (40), 30 states have return successors, (122), 64 states have call predecessors, (122), 39 states have call successors, (122) [2023-12-02 17:31:43,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 465 transitions. [2023-12-02 17:31:43,997 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 465 transitions. Word has length 93 [2023-12-02 17:31:43,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:43,997 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 465 transitions. [2023-12-02 17:31:43,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.1875) internal successors, (83), 14 states have internal predecessors, (83), 10 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-02 17:31:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 465 transitions. [2023-12-02 17:31:43,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-02 17:31:43,999 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:43,999 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:44,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 17:31:44,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:44,200 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:44,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1172080739, now seen corresponding path program 2 times [2023-12-02 17:31:44,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:44,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928663476] [2023-12-02 17:31:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:44,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-02 17:31:44,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:44,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928663476] [2023-12-02 17:31:44,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928663476] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:44,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276883099] [2023-12-02 17:31:44,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:31:44,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:44,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:44,520 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:44,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 17:31:44,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:31:44,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:31:44,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:31:44,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-12-02 17:31:44,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2023-12-02 17:31:44,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276883099] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:44,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057273014] [2023-12-02 17:31:44,813 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:44,814 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:44,814 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:44,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:44,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2023-12-02 17:31:44,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294659540] [2023-12-02 17:31:44,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:44,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 17:31:44,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:44,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 17:31:44,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2023-12-02 17:31:44,818 INFO L87 Difference]: Start difference. First operand 352 states and 465 transitions. Second operand has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 7 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (16), 13 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-02 17:31:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:45,196 INFO L93 Difference]: Finished difference Result 606 states and 829 transitions. [2023-12-02 17:31:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 17:31:45,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 7 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (16), 13 states have call predecessors, (16), 7 states have call successors, (16) Word has length 94 [2023-12-02 17:31:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:45,200 INFO L225 Difference]: With dead ends: 606 [2023-12-02 17:31:45,200 INFO L226 Difference]: Without dead ends: 603 [2023-12-02 17:31:45,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 17:31:45,202 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 67 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:45,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 442 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:31:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-12-02 17:31:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 440. [2023-12-02 17:31:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 349 states have (on average 1.0859598853868195) internal successors, (379), 340 states have internal predecessors, (379), 47 states have call successors, (47), 14 states have call predecessors, (47), 40 states have return successors, (182), 85 states have call predecessors, (182), 46 states have call successors, (182) [2023-12-02 17:31:45,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 608 transitions. [2023-12-02 17:31:45,227 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 608 transitions. Word has length 94 [2023-12-02 17:31:45,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:45,227 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 608 transitions. [2023-12-02 17:31:45,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 7 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (16), 13 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-02 17:31:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 608 transitions. [2023-12-02 17:31:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-02 17:31:45,228 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:45,228 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:31:45,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-02 17:31:45,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:45,429 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:45,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:45,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1974764640, now seen corresponding path program 1 times [2023-12-02 17:31:45,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:45,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569287933] [2023-12-02 17:31:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:45,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-02 17:31:45,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:45,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569287933] [2023-12-02 17:31:45,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569287933] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:45,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096601939] [2023-12-02 17:31:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:45,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:45,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:45,651 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:45,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 17:31:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:45,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 17:31:45,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:45,865 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-02 17:31:45,865 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2023-12-02 17:31:46,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096601939] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:46,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688834107] [2023-12-02 17:31:46,373 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:46,374 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:46,374 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:46,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:46,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 33 [2023-12-02 17:31:46,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531997378] [2023-12-02 17:31:46,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:46,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 17:31:46,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:46,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 17:31:46,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 17:31:46,377 INFO L87 Difference]: Start difference. First operand 440 states and 608 transitions. Second operand has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) [2023-12-02 17:31:46,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:46,719 INFO L93 Difference]: Finished difference Result 618 states and 836 transitions. [2023-12-02 17:31:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-12-02 17:31:46,720 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) Word has length 95 [2023-12-02 17:31:46,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:46,723 INFO L225 Difference]: With dead ends: 618 [2023-12-02 17:31:46,723 INFO L226 Difference]: Without dead ends: 616 [2023-12-02 17:31:46,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 167 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 17:31:46,725 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 39 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:46,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 484 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:31:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-12-02 17:31:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 431. [2023-12-02 17:31:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 339 states have (on average 1.0589970501474926) internal successors, (359), 336 states have internal predecessors, (359), 46 states have call successors, (46), 14 states have call predecessors, (46), 42 states have return successors, (185), 80 states have call predecessors, (185), 45 states have call successors, (185) [2023-12-02 17:31:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 590 transitions. [2023-12-02 17:31:46,749 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 590 transitions. Word has length 95 [2023-12-02 17:31:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:46,750 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 590 transitions. [2023-12-02 17:31:46,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) [2023-12-02 17:31:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 590 transitions. [2023-12-02 17:31:46,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-12-02 17:31:46,752 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:46,752 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2023-12-02 17:31:46,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 17:31:46,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 17:31:46,953 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:46,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash -258378983, now seen corresponding path program 1 times [2023-12-02 17:31:46,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:46,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686152669] [2023-12-02 17:31:46,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:46,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 82 proven. 141 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-12-02 17:31:47,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:47,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686152669] [2023-12-02 17:31:47,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686152669] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:47,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357026181] [2023-12-02 17:31:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:47,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:47,236 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:47,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 17:31:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:47,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 17:31:47,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 88 proven. 70 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-12-02 17:31:47,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 88 proven. 70 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2023-12-02 17:31:47,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357026181] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:47,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1601801285] [2023-12-02 17:31:47,770 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:47,770 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:47,770 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:47,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:47,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 26 [2023-12-02 17:31:47,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885382485] [2023-12-02 17:31:47,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:47,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 17:31:47,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:47,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 17:31:47,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2023-12-02 17:31:47,772 INFO L87 Difference]: Start difference. First operand 431 states and 590 transitions. Second operand has 26 states, 24 states have (on average 4.958333333333333) internal successors, (119), 22 states have internal predecessors, (119), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2023-12-02 17:31:48,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:48,171 INFO L93 Difference]: Finished difference Result 715 states and 994 transitions. [2023-12-02 17:31:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 17:31:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.958333333333333) internal successors, (119), 22 states have internal predecessors, (119), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) Word has length 164 [2023-12-02 17:31:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:48,174 INFO L225 Difference]: With dead ends: 715 [2023-12-02 17:31:48,174 INFO L226 Difference]: Without dead ends: 311 [2023-12-02 17:31:48,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 313 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 17:31:48,177 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 253 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:48,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 425 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:31:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-12-02 17:31:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 292. [2023-12-02 17:31:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 228 states have (on average 1.0482456140350878) internal successors, (239), 231 states have internal predecessors, (239), 33 states have call successors, (33), 14 states have call predecessors, (33), 27 states have return successors, (74), 46 states have call predecessors, (74), 32 states have call successors, (74) [2023-12-02 17:31:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 346 transitions. [2023-12-02 17:31:48,191 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 346 transitions. Word has length 164 [2023-12-02 17:31:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:48,191 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 346 transitions. [2023-12-02 17:31:48,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.958333333333333) internal successors, (119), 22 states have internal predecessors, (119), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2023-12-02 17:31:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 346 transitions. [2023-12-02 17:31:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-02 17:31:48,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:48,193 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-12-02 17:31:48,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-02 17:31:48,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 17:31:48,394 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:48,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:48,394 INFO L85 PathProgramCache]: Analyzing trace with hash -341892502, now seen corresponding path program 1 times [2023-12-02 17:31:48,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:48,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333796089] [2023-12-02 17:31:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:48,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 85 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-12-02 17:31:48,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:48,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333796089] [2023-12-02 17:31:48,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333796089] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:48,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718148540] [2023-12-02 17:31:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:48,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:48,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:48,909 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:48,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 17:31:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:49,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 17:31:49,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 59 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-12-02 17:31:49,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 74 proven. 54 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2023-12-02 17:31:50,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718148540] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:50,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1621435603] [2023-12-02 17:31:50,609 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:50,609 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:50,609 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:50,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:50,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 22] total 44 [2023-12-02 17:31:50,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101422384] [2023-12-02 17:31:50,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:50,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-02 17:31:50,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-02 17:31:50,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 17:31:50,614 INFO L87 Difference]: Start difference. First operand 292 states and 346 transitions. Second operand has 45 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 45 states have internal predecessors, (119), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) [2023-12-02 17:31:50,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:50,960 INFO L93 Difference]: Finished difference Result 364 states and 430 transitions. [2023-12-02 17:31:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-02 17:31:50,961 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 45 states have internal predecessors, (119), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) Word has length 148 [2023-12-02 17:31:50,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:50,964 INFO L225 Difference]: With dead ends: 364 [2023-12-02 17:31:50,964 INFO L226 Difference]: Without dead ends: 359 [2023-12-02 17:31:50,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 267 SyntacticMatches, 13 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=426, Invalid=2766, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 17:31:50,966 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:50,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 470 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 17:31:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-12-02 17:31:50,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 311. [2023-12-02 17:31:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 242 states have (on average 1.0289256198347108) internal successors, (249), 247 states have internal predecessors, (249), 35 states have call successors, (35), 14 states have call predecessors, (35), 31 states have return successors, (82), 49 states have call predecessors, (82), 34 states have call successors, (82) [2023-12-02 17:31:50,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 366 transitions. [2023-12-02 17:31:50,999 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 366 transitions. Word has length 148 [2023-12-02 17:31:50,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:50,999 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 366 transitions. [2023-12-02 17:31:50,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 45 states have internal predecessors, (119), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) [2023-12-02 17:31:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 366 transitions. [2023-12-02 17:31:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-12-02 17:31:51,003 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:51,004 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1] [2023-12-02 17:31:51,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 17:31:51,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:51,204 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:51,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:51,205 INFO L85 PathProgramCache]: Analyzing trace with hash 383108161, now seen corresponding path program 2 times [2023-12-02 17:31:51,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:51,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954286858] [2023-12-02 17:31:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:51,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 130 proven. 48 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2023-12-02 17:31:51,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:51,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954286858] [2023-12-02 17:31:51,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954286858] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:51,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995821134] [2023-12-02 17:31:51,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:31:51,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:51,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:51,365 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:51,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 17:31:51,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 17:31:51,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:31:51,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:31:51,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 130 proven. 48 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2023-12-02 17:31:51,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 130 proven. 48 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2023-12-02 17:31:51,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995821134] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:51,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1204255669] [2023-12-02 17:31:51,781 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:51,781 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:51,781 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:51,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:51,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2023-12-02 17:31:51,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143101031] [2023-12-02 17:31:51,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:51,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 17:31:51,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:51,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 17:31:51,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-12-02 17:31:51,783 INFO L87 Difference]: Start difference. First operand 311 states and 366 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 17:31:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:51,927 INFO L93 Difference]: Finished difference Result 337 states and 395 transitions. [2023-12-02 17:31:51,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 17:31:51,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 202 [2023-12-02 17:31:51,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:51,934 INFO L225 Difference]: With dead ends: 337 [2023-12-02 17:31:51,934 INFO L226 Difference]: Without dead ends: 313 [2023-12-02 17:31:51,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 398 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-12-02 17:31:51,935 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:51,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 169 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:31:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-12-02 17:31:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 309. [2023-12-02 17:31:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 241 states have (on average 1.0248962655601659) internal successors, (247), 245 states have internal predecessors, (247), 35 states have call successors, (35), 14 states have call predecessors, (35), 30 states have return successors, (77), 49 states have call predecessors, (77), 34 states have call successors, (77) [2023-12-02 17:31:51,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 359 transitions. [2023-12-02 17:31:51,957 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 359 transitions. Word has length 202 [2023-12-02 17:31:51,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:51,958 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 359 transitions. [2023-12-02 17:31:51,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 17:31:51,958 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 359 transitions. [2023-12-02 17:31:51,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-12-02 17:31:51,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:51,962 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1] [2023-12-02 17:31:51,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 17:31:52,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:52,167 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:52,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:52,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1875824620, now seen corresponding path program 2 times [2023-12-02 17:31:52,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:52,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294420776] [2023-12-02 17:31:52,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:52,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 204 proven. 193 refuted. 0 times theorem prover too weak. 515 trivial. 0 not checked. [2023-12-02 17:31:52,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:52,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294420776] [2023-12-02 17:31:52,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294420776] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:52,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909547960] [2023-12-02 17:31:52,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 17:31:52,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:52,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:52,367 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:52,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 17:31:52,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 17:31:52,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:31:52,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 17:31:52,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2023-12-02 17:31:52,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2023-12-02 17:31:52,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909547960] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:52,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1703539655] [2023-12-02 17:31:52,809 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:52,810 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:52,810 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:52,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:52,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2023-12-02 17:31:52,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430292902] [2023-12-02 17:31:52,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:52,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 17:31:52,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:52,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 17:31:52,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-12-02 17:31:52,814 INFO L87 Difference]: Start difference. First operand 309 states and 359 transitions. Second operand has 21 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 10 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 11 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-02 17:31:53,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:53,307 INFO L93 Difference]: Finished difference Result 547 states and 652 transitions. [2023-12-02 17:31:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 17:31:53,307 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 10 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 11 states have call predecessors, (17), 9 states have call successors, (17) Word has length 235 [2023-12-02 17:31:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:53,310 INFO L225 Difference]: With dead ends: 547 [2023-12-02 17:31:53,310 INFO L226 Difference]: Without dead ends: 322 [2023-12-02 17:31:53,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 461 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=223, Invalid=1583, Unknown=0, NotChecked=0, Total=1806 [2023-12-02 17:31:53,312 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 95 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:53,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 321 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:31:53,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-12-02 17:31:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 302. [2023-12-02 17:31:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 236 states have (on average 1.0254237288135593) internal successors, (242), 239 states have internal predecessors, (242), 34 states have call successors, (34), 14 states have call predecessors, (34), 29 states have return successors, (76), 48 states have call predecessors, (76), 33 states have call successors, (76) [2023-12-02 17:31:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 352 transitions. [2023-12-02 17:31:53,334 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 352 transitions. Word has length 235 [2023-12-02 17:31:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:53,335 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 352 transitions. [2023-12-02 17:31:53,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.15) internal successors, (103), 20 states have internal predecessors, (103), 10 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 11 states have call predecessors, (17), 9 states have call successors, (17) [2023-12-02 17:31:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 352 transitions. [2023-12-02 17:31:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-12-02 17:31:53,338 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:53,338 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 10, 10, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1] [2023-12-02 17:31:53,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 17:31:53,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:53,539 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:53,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:53,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1983262909, now seen corresponding path program 3 times [2023-12-02 17:31:53,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:53,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518717986] [2023-12-02 17:31:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:53,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 187 proven. 83 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-12-02 17:31:53,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518717986] [2023-12-02 17:31:53,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518717986] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105938785] [2023-12-02 17:31:53,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:31:53,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:53,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:53,738 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:53,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 17:31:53,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:31:53,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:31:53,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 17:31:53,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 170 proven. 306 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2023-12-02 17:31:54,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 170 proven. 320 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 17:31:55,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105938785] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:55,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1981441132] [2023-12-02 17:31:55,046 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:55,046 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:55,046 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:55,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:55,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 19] total 25 [2023-12-02 17:31:55,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458192642] [2023-12-02 17:31:55,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:55,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 17:31:55,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:55,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 17:31:55,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-12-02 17:31:55,049 INFO L87 Difference]: Start difference. First operand 302 states and 352 transitions. Second operand has 25 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 19 states have call successors, (24), 2 states have call predecessors, (24), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2023-12-02 17:31:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:55,454 INFO L93 Difference]: Finished difference Result 601 states and 746 transitions. [2023-12-02 17:31:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 17:31:55,454 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 19 states have call successors, (24), 2 states have call predecessors, (24), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) Word has length 221 [2023-12-02 17:31:55,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:55,458 INFO L225 Difference]: With dead ends: 601 [2023-12-02 17:31:55,458 INFO L226 Difference]: Without dead ends: 361 [2023-12-02 17:31:55,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 422 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 17:31:55,460 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 272 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:55,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 359 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:31:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2023-12-02 17:31:55,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 327. [2023-12-02 17:31:55,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 257 states have (on average 1.027237354085603) internal successors, (264), 257 states have internal predecessors, (264), 38 states have call successors, (38), 18 states have call predecessors, (38), 29 states have return successors, (74), 51 states have call predecessors, (74), 37 states have call successors, (74) [2023-12-02 17:31:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 376 transitions. [2023-12-02 17:31:55,481 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 376 transitions. Word has length 221 [2023-12-02 17:31:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:55,482 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 376 transitions. [2023-12-02 17:31:55,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 19 states have call successors, (24), 2 states have call predecessors, (24), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2023-12-02 17:31:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 376 transitions. [2023-12-02 17:31:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-12-02 17:31:55,485 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:55,485 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 1, 1, 1] [2023-12-02 17:31:55,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 17:31:55,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:55,686 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:55,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:55,686 INFO L85 PathProgramCache]: Analyzing trace with hash 142559710, now seen corresponding path program 3 times [2023-12-02 17:31:55,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:55,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998877272] [2023-12-02 17:31:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:55,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 265 proven. 96 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2023-12-02 17:31:55,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:55,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998877272] [2023-12-02 17:31:55,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998877272] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:55,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529200260] [2023-12-02 17:31:55,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 17:31:55,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:55,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:55,925 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:55,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 17:31:56,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 17:31:56,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 17:31:56,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 17:31:56,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 200 proven. 366 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2023-12-02 17:31:56,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:31:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 204 proven. 382 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2023-12-02 17:31:57,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529200260] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:31:57,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [498223864] [2023-12-02 17:31:57,453 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:31:57,453 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:31:57,453 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:31:57,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:31:57,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 21] total 27 [2023-12-02 17:31:57,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157000228] [2023-12-02 17:31:57,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:31:57,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 17:31:57,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:31:57,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 17:31:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-12-02 17:31:57,456 INFO L87 Difference]: Start difference. First operand 327 states and 376 transitions. Second operand has 27 states, 26 states have (on average 6.038461538461538) internal successors, (157), 26 states have internal predecessors, (157), 20 states have call successors, (27), 2 states have call predecessors, (27), 10 states have return successors, (29), 12 states have call predecessors, (29), 19 states have call successors, (29) [2023-12-02 17:31:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:31:57,965 INFO L93 Difference]: Finished difference Result 495 states and 567 transitions. [2023-12-02 17:31:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 17:31:57,966 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 6.038461538461538) internal successors, (157), 26 states have internal predecessors, (157), 20 states have call successors, (27), 2 states have call predecessors, (27), 10 states have return successors, (29), 12 states have call predecessors, (29), 19 states have call successors, (29) Word has length 239 [2023-12-02 17:31:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:31:57,968 INFO L225 Difference]: With dead ends: 495 [2023-12-02 17:31:57,968 INFO L226 Difference]: Without dead ends: 273 [2023-12-02 17:31:57,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 455 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 17:31:57,970 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 202 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 17:31:57,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 399 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 17:31:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-12-02 17:31:57,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2023-12-02 17:31:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 215 states have (on average 1.0232558139534884) internal successors, (220), 216 states have internal predecessors, (220), 34 states have call successors, (34), 18 states have call predecessors, (34), 23 states have return successors, (50), 38 states have call predecessors, (50), 33 states have call successors, (50) [2023-12-02 17:31:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 304 transitions. [2023-12-02 17:31:57,992 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 304 transitions. Word has length 239 [2023-12-02 17:31:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:31:57,992 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 304 transitions. [2023-12-02 17:31:57,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 6.038461538461538) internal successors, (157), 26 states have internal predecessors, (157), 20 states have call successors, (27), 2 states have call predecessors, (27), 10 states have return successors, (29), 12 states have call predecessors, (29), 19 states have call successors, (29) [2023-12-02 17:31:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 304 transitions. [2023-12-02 17:31:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-12-02 17:31:57,994 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:31:57,994 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1] [2023-12-02 17:31:57,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-02 17:31:58,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:58,194 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2023-12-02 17:31:58,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:31:58,195 INFO L85 PathProgramCache]: Analyzing trace with hash 2061307917, now seen corresponding path program 4 times [2023-12-02 17:31:58,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:31:58,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668452954] [2023-12-02 17:31:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:31:58,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:31:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 149 proven. 248 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2023-12-02 17:31:59,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:31:59,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668452954] [2023-12-02 17:31:59,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668452954] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:31:59,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992596722] [2023-12-02 17:31:59,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 17:31:59,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:31:59,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:31:59,160 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:31:59,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 17:31:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:31:59,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 17:31:59,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:31:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 148 proven. 181 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2023-12-02 17:31:59,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:32:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 218 proven. 160 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-12-02 17:32:02,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992596722] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:32:02,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727141760] [2023-12-02 17:32:02,465 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 17:32:02,466 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:32:02,466 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 17:32:02,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 17:32:02,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 29] total 56 [2023-12-02 17:32:02,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036768870] [2023-12-02 17:32:02,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 17:32:02,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-02 17:32:02,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:32:02,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-02 17:32:02,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2797, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 17:32:02,470 INFO L87 Difference]: Start difference. First operand 273 states and 304 transitions. Second operand has 57 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 57 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 18 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) [2023-12-02 17:32:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:32:02,663 INFO L93 Difference]: Finished difference Result 284 states and 315 transitions. [2023-12-02 17:32:02,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 17:32:02,663 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 57 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 18 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) Word has length 240 [2023-12-02 17:32:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:32:02,664 INFO L225 Difference]: With dead ends: 284 [2023-12-02 17:32:02,664 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 17:32:02,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 445 SyntacticMatches, 27 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=478, Invalid=3304, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 17:32:02,667 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:32:02,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 447 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 17:32:02,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 17:32:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 17:32:02,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 17:32:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 17:32:02,668 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 240 [2023-12-02 17:32:02,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:32:02,669 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 17:32:02,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 57 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 18 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) [2023-12-02 17:32:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 17:32:02,669 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 17:32:02,671 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 12 remaining) [2023-12-02 17:32:02,671 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 12 remaining) [2023-12-02 17:32:02,672 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 12 remaining) [2023-12-02 17:32:02,672 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 12 remaining) [2023-12-02 17:32:02,672 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 12 remaining) [2023-12-02 17:32:02,672 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 12 remaining) [2023-12-02 17:32:02,672 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 12 remaining) [2023-12-02 17:32:02,672 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 12 remaining) [2023-12-02 17:32:02,672 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 12 remaining) [2023-12-02 17:32:02,672 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 12 remaining) [2023-12-02 17:32:02,672 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 12 remaining) [2023-12-02 17:32:02,672 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 12 remaining) [2023-12-02 17:32:02,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 17:32:02,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:32:02,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 17:32:05,712 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 17:32:05,712 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 17:32:05,713 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (= 6 |ULTIMATE.start_main_~x~0#1|) [2023-12-02 17:32:05,713 INFO L899 garLoopResultBuilder]: For program point L39-1(line 39) no Hoare annotation was computed. [2023-12-02 17:32:05,713 INFO L899 garLoopResultBuilder]: For program point fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,713 INFO L899 garLoopResultBuilder]: For program point L25(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,713 INFO L899 garLoopResultBuilder]: For program point fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,713 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,713 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (< 1 |fibo2_#in~n|) (or (= fibo2_~n |fibo2_#in~n|) (< 5 |fibo2_#in~n|))) [2023-12-02 17:32:05,713 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,714 INFO L899 garLoopResultBuilder]: For program point L25-4(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,714 INFO L899 garLoopResultBuilder]: For program point L25-5(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,714 INFO L895 garLoopResultBuilder]: At program point L25-6(line 25) the Hoare annotation is: (and (let ((.cse0 (<= 1 |fibo2_#t~ret6|))) (or (and (<= |fibo2_#t~ret6| 3) .cse0 (= 5 |fibo2_#in~n|) (= fibo2_~n 5)) (< 5 |fibo2_#in~n|) (and (= fibo2_~n |fibo2_#in~n|) (<= |fibo2_#t~ret6| 2) .cse0))) (or (= |fibo2_#t~ret6| 1) (< 3 |fibo2_#in~n|)) (< 1 |fibo2_#in~n|)) [2023-12-02 17:32:05,714 INFO L899 garLoopResultBuilder]: For program point L25-7(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,714 INFO L899 garLoopResultBuilder]: For program point L25-8(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,714 INFO L899 garLoopResultBuilder]: For program point L25-9(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,715 INFO L899 garLoopResultBuilder]: For program point fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,715 INFO L899 garLoopResultBuilder]: For program point fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,715 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 19 27) the Hoare annotation is: true [2023-12-02 17:32:05,715 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2023-12-02 17:32:05,715 INFO L899 garLoopResultBuilder]: For program point fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,715 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2023-12-02 17:32:05,715 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2023-12-02 17:32:05,716 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2023-12-02 17:32:05,716 INFO L899 garLoopResultBuilder]: For program point fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2023-12-02 17:32:05,716 INFO L899 garLoopResultBuilder]: For program point fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,716 INFO L899 garLoopResultBuilder]: For program point fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,716 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,716 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,716 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (and (or (< 4 |fibo1_#in~n|) (= fibo1_~n |fibo1_#in~n|)) (or (= fibo1_~n 2) (< 2 |fibo1_#in~n|)) (or (< |fibo1_#in~n| 6) (= fibo1_~n 6) (< 6 |fibo1_#in~n|))) [2023-12-02 17:32:05,716 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,716 INFO L899 garLoopResultBuilder]: For program point L15-4(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,716 INFO L899 garLoopResultBuilder]: For program point fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,717 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2023-12-02 17:32:05,717 INFO L899 garLoopResultBuilder]: For program point L15-5(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,717 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 17) the Hoare annotation is: true [2023-12-02 17:32:05,717 INFO L895 garLoopResultBuilder]: At program point L15-6(line 15) the Hoare annotation is: (let ((.cse0 (and (= 2 |fibo1_#t~ret4|) (= |fibo1_#in~n| 4) (= fibo1_~n 4))) (.cse1 (< 4 |fibo1_#in~n|))) (and (or (= fibo1_~n 2) (< 2 |fibo1_#in~n|)) (or .cse0 (< |fibo1_#in~n| 4) .cse1) (or .cse0 .cse1 (and (= |fibo1_#t~ret4| 1) (= fibo1_~n |fibo1_#in~n|))) (or (and (<= |fibo1_#t~ret4| 5) (= fibo1_~n 6) (<= 0 (+ |fibo1_#t~ret4| 2147483648))) (< |fibo1_#in~n| 6) (< 6 |fibo1_#in~n|)))) [2023-12-02 17:32:05,717 INFO L899 garLoopResultBuilder]: For program point L15-7(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,717 INFO L899 garLoopResultBuilder]: For program point L15-8(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,717 INFO L899 garLoopResultBuilder]: For program point L15-9(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,717 INFO L899 garLoopResultBuilder]: For program point fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,717 INFO L899 garLoopResultBuilder]: For program point fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,718 INFO L899 garLoopResultBuilder]: For program point fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2023-12-02 17:32:05,718 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2023-12-02 17:32:05,718 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2023-12-02 17:32:05,718 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2023-12-02 17:32:05,721 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 17:32:05,723 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 17:32:05,726 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 05:32:05 BoogieIcfgContainer [2023-12-02 17:32:05,727 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 17:32:05,727 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 17:32:05,727 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 17:32:05,728 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 17:32:05,728 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:31:25" (3/4) ... [2023-12-02 17:32:05,729 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 17:32:05,732 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2023-12-02 17:32:05,732 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2023-12-02 17:32:05,736 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-12-02 17:32:05,736 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-12-02 17:32:05,737 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-12-02 17:32:05,737 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 17:32:05,810 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 17:32:05,810 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 17:32:05,811 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 17:32:05,811 INFO L158 Benchmark]: Toolchain (without parser) took 41109.81ms. Allocated memory was 167.8MB in the beginning and 423.6MB in the end (delta: 255.9MB). Free memory was 130.4MB in the beginning and 314.5MB in the end (delta: -184.1MB). Peak memory consumption was 71.5MB. Max. memory is 16.1GB. [2023-12-02 17:32:05,812 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 113.2MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 17:32:05,812 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.33ms. Allocated memory is still 167.8MB. Free memory was 130.4MB in the beginning and 140.6MB in the end (delta: -10.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 17:32:05,812 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.55ms. Allocated memory is still 167.8MB. Free memory was 140.6MB in the beginning and 138.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 17:32:05,813 INFO L158 Benchmark]: Boogie Preprocessor took 17.20ms. Allocated memory is still 167.8MB. Free memory was 138.9MB in the beginning and 138.3MB in the end (delta: 650.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 17:32:05,813 INFO L158 Benchmark]: RCFGBuilder took 304.46ms. Allocated memory is still 167.8MB. Free memory was 137.6MB in the beginning and 125.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 17:32:05,813 INFO L158 Benchmark]: TraceAbstraction took 40452.37ms. Allocated memory was 167.8MB in the beginning and 423.6MB in the end (delta: 255.9MB). Free memory was 124.3MB in the beginning and 318.6MB in the end (delta: -194.4MB). Peak memory consumption was 244.3MB. Max. memory is 16.1GB. [2023-12-02 17:32:05,814 INFO L158 Benchmark]: Witness Printer took 83.40ms. Allocated memory is still 423.6MB. Free memory was 318.6MB in the beginning and 314.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 17:32:05,815 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 113.2MB. Free memory is still 86.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 214.33ms. Allocated memory is still 167.8MB. Free memory was 130.4MB in the beginning and 140.6MB in the end (delta: -10.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.55ms. Allocated memory is still 167.8MB. Free memory was 140.6MB in the beginning and 138.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.20ms. Allocated memory is still 167.8MB. Free memory was 138.9MB in the beginning and 138.3MB in the end (delta: 650.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 304.46ms. Allocated memory is still 167.8MB. Free memory was 137.6MB in the beginning and 125.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 40452.37ms. Allocated memory was 167.8MB in the beginning and 423.6MB in the end (delta: 255.9MB). Free memory was 124.3MB in the beginning and 318.6MB in the end (delta: -194.4MB). Peak memory consumption was 244.3MB. Max. memory is 16.1GB. * Witness Printer took 83.40ms. Allocated memory is still 423.6MB. Free memory was 318.6MB in the beginning and 314.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 46 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 40.4s, OverallIterations: 35, TraceHistogramMax: 13, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 10.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3204 SdHoareTripleChecker+Valid, 6.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3115 mSDsluCounter, 9562 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8324 mSDsCounter, 957 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11931 IncrementalHoareTripleChecker+Invalid, 12888 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 957 mSolverCounterUnsat, 1238 mSDtfsCounter, 11931 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5625 GetRequests, 4652 SyntacticMatches, 178 SemanticMatches, 795 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10385 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=440occurred in iteration=27, InterpolantAutomatonStates: 571, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 35 MinimizatonAttempts, 1018 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 1129 PreInvPairs, 1663 NumberOfFragments, 144 HoareAnnotationTreeSize, 1129 FomulaSimplifications, 185013 FormulaSimplificationTreeSizeReduction, 2.2s HoareSimplificationTime, 7 FomulaSimplificationsInter, 1900 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 18.7s InterpolantComputationTime, 5501 NumberOfCodeBlocks, 4891 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 7799 ConstructedInterpolants, 0 QuantifiedInterpolants, 15121 SizeOfPredicates, 74 NumberOfNonLiveVariables, 4235 ConjunctsInSsa, 328 ConjunctsInUnsatCore, 80 InterpolantComputations, 15 PerfectInterpolantSequences, 14687/18528 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 12 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-02 17:32:05,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cd05f66-4ea1-45f5-9bde-361fd9549246/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE